Autor:	Hartwell, Edward M., Blum, Solomon, Stevens, F. E., May, Max B., Smith, Edwin Z., McLoughlin, James J., Butler, John A., Wilson, George S., Sherman, Sidney A., Wilcox, Delos F., Smith, J. Allen, Joerns, W. G.
Zdroj:	The Annals of the American Academy of Political and Social Science, 1905 May 01. 25, 201-221.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1010953 Zobrazit plný text záznamu